Brooke Mueller

The on-again, off-again amicable relationship between Charlie Sheen and his ex-wife Denise Richards – in which they were once so close that Richards was caring for Sheen's children with another woman – has once again turned vitriolic.

The knock on the front door of Charlie Sheen's troubled ex-wife Brooke Mueller's home came around 9 p.m. on May 2. Social workers from L.A.'s Department of Child and Family Services, alarmed by Mueller's erratic behavior in recent weeks, had arrived for one explicit reason: to take custody of her two 4-year-old twins, Bob and Max.

Charlie Sheen's ex wife has checked herself into a "long-term, in-patient treatment center" following a recent arrest for alleged cocaine possession and assault, her rep Steve Honig says in a statement.

"Brooke has decided to remove herself from the media spotlight ... [so] she can focus on her recovery without distraction," the statement reads. "Brooke's goal is to maintain her sobriety, and she believes this is the best option to reach that goal."

Despite a drug-related arrest over the weekend, Brooke Mueller's camp is confident she'll come out of this debacle unscathed.

"[Mueller's lawyer Yale Galanter] "will vigorously defend Brooke with the goal of having all these charges dropped once the facts of the case come to light," Mueller's rep Steve Honig says in a statement.

Mueller, 34, who was taken into custody for alleged assault and cocaine possession in Aspen, Colo., will apparently not lose her twin boys Max and Bob – regardless of what happens with the charges.

According to a police statement, "On Dec. 2, 2011, at approximately 11:32 p.m., officers with the Aspen
Police Department were on a routine walk through at the [music venue] Belly Up, 450 S. Galena Street, Aspen when they contacted a woman who reported an assault which had taken place. The woman identified Brooke Mueller, 34, of Los Angeles, California as the aggressor.

No stranger to eyebrow-raising scenarios, it only makes sense that Paris Hilton calls her new Oxygen series "very dramatic."

But it's not just Hilton who brings intensity to the small-screen in her latest reality TV venture. The socialite says when her show premieres June 1, viewers will see "everything" unfold with her tabloid-friendly pal and costar Brooke Mueller, who has been fighting addiction publicly while battling her ex, Charlie Sheen.

"Brooke's an open book," Hilton, 30, told PEOPLE on Friday, while promoting The World According to Paris at NBCUniversal Summer Press Day at the Langham Hotel in Pasadena, Calif. "She's not afraid to show who she is. She's not afraid to tell the truth. And as a producer of the show, I love that for TV. I love someone who's not afraid to show everything."

The actor was seen looking serious as he arrived in a black Rolls-Royce. Mueller, 33, wearing a multicolored top with a black skirt, showed up early with her attorneys and looked pensive. At the beginning of the hearing, which started at 9:30 a.m., the judge agreed to close the courtroom and the hearing was to be held behind closed doors.

Sheen, who's midway through his North American live tour, told a Mashantucket, Conn., audience on Sunday that he was returning to L.A. to "get my kids back" after his estranged wife missed a mandatory drug test Friday.